docs: def set_reverb(self, roomsize=-1.0, damping=-1.0, width=-1.0, level=-1.0):
          """                                  
          roomsize Reverb room size value (0.0-1.2)
          damping Reverb damping value (0.0-1.0)
          width Reverb width value (0.0-100.0)
          level Reverb level value (0.0-1.0)
          """
          set=0
          if roomsize>=0:
              set+=0b0001
          if damping>=0:
              set+=0b0010
          if width>=0:
              set+=0b0100
          if level>=0:
              set+=0b1000
          return fluid_synth_set_reverb_full(self.synth, set, roomsize, damping, width, level)